[Bug 42854] Power management doesn't work on dualhead

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=42854

pedram.navid at gmail.com changed:

           What    |Removed                     |Added
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                 CC|                            |pedram.navid at gmail.com

--- Comment #4 from pedram.navid at gmail.com ---
I can confirm this issue as well. Latest 1.7 drivers. This is very clearly a
bug. Dual output in Windows does not lead to maxing out the engine or memory
clocks. There is no way simple 2d output requires the same amount of work from
the GPU as graphics-intesive 3D games.

With two DVI outputs:
---------------------
cat /sys/kernel/debug/dri/0/radeon_pm_info 
default engine clock: 800000 kHz
current engine clock: 799940 kHz
default memory clock: 1250000 kHz
current memory clock: 1250000 kHz

cat  /sys/class/drm/card0/device/power_method 
profile

cat  /sys/class/drm/card0/device/power_profile 
low

sensors
radeon-pci-0100
Adapter: PCI adapter
temp1:        +62.5 C  


With one DVI output
--------------------
cat /sys/kernel/debug/dri/0/radeon_pm_info 
default engine clock: 800000 kHz
current engine clock: 249990 kHz
default memory clock: 1250000 kHz
current memory clock: 150000 kHz

Adapter: PCI adapter
temp1:        +53.0 C  (less than 30 seconds after switching)
Adapter: PCI adapter
temp1:        +42.5 C  (stablized after a few mins)

--- Comment #5 from pedram.navid at gmail.com ---
I should add that using the proprietary ATI drivers on Linux, dual-head is cool
and quiet as well

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